CVE-2026-91931
Flowise before 3.1.4 Remote Code Execution via Custom MCP npx
CVSS Score
8.5
EPSS Score
0.0%
EPSS Percentile
0th
Flowise before 3.1.4 contains a remote code execution vulnerability in the Custom MCP node that allows authenticated attackers to execute arbitrary code by supplying npx package names in the mcpServerConfig parameter. Attackers can invoke npx with attacker-controlled npm packages to execute code on the Flowise server.
| CWE | CWE-78 |
| Vendor | flowiseai |
| Product | flowise |
| Published | Sep 15, 2026 |
Stay Ahead of the Next One
Get instant alerts for flowiseai flowise
Be the first to know when new high vulnerabilities affecting flowiseai flowise are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H Attack Vector
Network
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
FlowiseAI / Flowise
0 < 3.1.4
FlowiseAI / Flowise
0 < 3.1.4
References
Credits
🔍 DavidCarliez